Door lock



Sept. 3, 1940.

J. G. HICKMAN ET AL Filed 001'.. 17, 1938 DOOR LOCK 2 Sheets-Sheet l INVENTORS. c/o/M/ 6. /f/cfrMH/v.

ORNEYJ. v

Sept- 3, 1940- v v J. G. HlcKMAN ET Al. '3,213,839

DOOR LOCK Filed oct. 17, 195s 2 sheets-sheet 2 ATTORNEYS. l

Patented sept. s; 1940 UNITED STATES PATENT OFFICE noon Loox Application October 17, 1938, Serial No. 235,414

5 Claims.

This invention relates to a door lock and more particularly to a door lock for an automotive vehicle.

In the presently used automobile door lock the inside handle is always connected to the bolt so that turning of the handle always retractsthe bolt and permits opening of the door. This type of lock presents a hazard to the occupant of the vehicle, particularly when the car is in motion. Many children have fallen out of vehicles while in motion by innocently turning the door handle which causes the door to open. Adults have also been injured by accidentally orpunwittingly turning the inside door handle which opens the door and causes the adult to fall out of the moving vehicle.

It is an object of this invention to increase the safety of the vehicle passenger, particularly against the hazard above mention'ed. This has been accomplished by arranging the inside remote door handle so that it can be disconnected from the latch bolt. When disconnected from the latch bolt, turning of the inside handle is ineffective to retract the latch bolt.

In the drawings:

Fig. 1 is an assembly view showing the inside remote handle connectedto the latch bolt so that turning of the handle retracts the latch bolt.

Fig. 2 is a section along the line 2-2 of Fig. 1.

Fig. 3 is a section along the line 3-3 of Fig. 1.

Fig. 4 is a side elevation showing the position of the draft link when turning of the remote handle is ineffective to retract the bolt.

Fig. 5 is anV assembly view showing the remote handle turned from its normal to its bolt retracting position but with the handle ineffective to retract the bolt.

Fig. 6 is a detail ofthe remote handle draft link.

Referring more particularly to'the drawings there is shown a door lock which per se is the -same as that shown in the Andersen-Bowlus Patent No. 2,039,873. The frame of the lock is designated I and the selvage plate 2. The bolt 3 is slidably mounted on the latch frame. A spiral spring 4 is anchored on the sliding bolt 3 by the clip e and a free end 6 engages one end of a lever' I which is pivotally mounted as 'at 8 upon the latch frame. The other end of the lever abuts against the outside rollback 9. The spindle I 0 of the outside door handle II is secured in the outside rollback 9 so that turning of the outside handle I I turns the rollback. A swinging control lever I2 is pivoted on pin I3 which is xed to the latch frame. The lever I2 can be pivoted about Yangular opening 36.

the pin I3 by a push and pull rod I4, the upper end of which projects through the garnish molding and is provided with a button I5. The lower end of the rod I4 is pivotally connected tothe lever I2 as at I6.

A retractor for the sliding bolt in the form of a lever I9 is pivotally secured at one end to the lever 'I .by the pin 20 and the other end of the retractor lever I9 is adapted for engagement with the lug 2| on the bolt 3, The lever I9 also has a lug 22 which slidably engages the lever I2 in the slot 23. The push button rod I4 can be raised or lowered to swing the lever I2 about the pin I3.

A snap over center spring 24 yieldably retains the llever I2 in raised or lowered position. The free end of the lever I2 is guided by a pin 25 which engages the lever in the slot 2li.I When the lever I9 is in raised position, as shown in Fig. 1, the outside handle can be turned down to swing the rollback 9 counter-clockwise. The rollback 9 operates through the lower end of lever I pin 20, and retractor I9 to retract the bolt. During the retraction of the bolt the free end of the retractor I9 abuts lug 2|. When the push button I5 is depressed the lever I9 is thrown to the position indicated in Fig. 5 clear of lug 2l. Turning of the outside rollback is now ineffective to lretract the bolt 3.` Thus far the lock described is identical with that shown in the Andersen-Bowlus Patent No. 2,039,873. A

An inside remote handle 30 is fixed on the shaft 3| which is rotatably supported on the lock board. A lever 32 is also fixed to the shaft 3l. A torsion spring 33 is provided for. returning the handle 30 to its normal horizontal position, shown in Fig. 1. The lever 32 is pivotally secured to a draft link 34 by a rivet 35. The other end of the draft link 34 is adapted for connection to thesliding bolt 3 and is shown in detail in Fig. G. This .end of the lever is provided with an elongated tri- The rod I4 has a return bent portion 31 which engages the link 34 in the triangular opening 36, see Fig. 3.

The draft link is also provided with an opening 38 which receives the pin 39 which is riveted to the inner end of the sliding bolt 3, see Fig. 2. The pin 39 is provided with a cross bar 40 which overlaps the draft link 34 along the top and bottom edges of the opening 38. The opening 38 comprises an enlarged portion 4I which provides shoulder 42 in the draft link 34 and the 'opening 38 also comprises an elongated portion 43 along which the pin 39 rides when the draft link 34 is ineffective to retract the bolt.

The operation yof the lock is as follows: When U the lock is in the condition shown in Fig. 1 so that pin 39 is positioned in front of shoulder 42, then turning of the inside handle 30 will retract the latch bolt 3 because the retracting or leftward movement of the draft link 34 is transmitted through pin 39 to the bolt 3. At this time turning of the outside handle and rollback I willv retract the bolt as above described and the push button-I is raised and retractor I9 is operatably connected to lug 2|. 1

To disconnect both the outside handle and the inside handle from the latch bolt Iand thus render both inner and outer handles ineffective to retract the bolt, the push button I5 is depressed. This position of the push button is shown in the full lines, Fig. 4. By depressing the push button I5 the return bent portion 31, which now interengagesthe draft link 34 in the reduced end of the triangular opening 38, swings draftlink 34 about pin 35 and thus disengages pin 39 from shoulder 42. At the same time the push rod I4,`acting through lever I2 and lug 22swings retractor I9 to lowered position so that it is free to swing -by lug 2l on bolt 3. If the outside handle is now turned, retractor I9 will simply move by lug 2l and the bolt 3 will not be retracted. If the inside handle 30 is now turned down from normal position, shown in Fig. 1, to bolt retracting position,

shown in Fig. 5, thedraft link 34 will be drawn to the left from the position shown in Fig. 4 to that shown in Fig. 5 and draft link 34 will simply slide along pin 39.111 the elongated opening 43. The'elongated opening 43 is sufficiently long so that the pin 39 will not reach the end of the opening 43 before the inside handle 30 has reached the limit of its turning movement, as shown in Fig. 5. v'I'he turning of the inside handle 30 is limited by lugs 50, one of which abuts,V

lever 32 when the inside handle is in normal position and the other of which abuts lever 32 when the handle has been swung to full bolt retracting position, shown in Fig. 5.

From the above it is evident that by depressing the push button I5 the safety of the occupant of the car is doubly assured. He is safe from molestation from without the car because the outside handle is ineective to retract the bolt and he is safe from falling out of the car because the bolt cannot be retracted by the inside handle to permit the door to open.`

We claim:

1. In a door lock assembly, a retractable latch bolt, a movable inside door handle, a draft link extending between the handle and the bolt, a connection between the handle and one end of one end of the link and the swingable handle,

and a pin and shoulder connection between the other end of the link and the bolt, said link being shiftable to disconnect the pin from the shoulder whereby swinging of the handle is ineffective to retract the bolt.

3. In a door lock assembly, a retractable latch bolt, a swinging handle, a draft link, a pivotal connection between one end of the draft link and the handle and a shiftable connection between the other end ofthe draft link and the bolt in the form of a shoulder on the draft link and a pin on the bolt, and means for shifting the draft link about its pivot to disconnect the shoulder from the pin whereby swinging of the handle is ineffective to retract the bolt.

4. In'a door lock assembly, a retractable latch bolt, a swingable handle, a draft link, a pivotal connection between one end of the draft link and the handle, a shiftable connection between the other end of the draft link and the bolt in the form of an opening in the draft link forming a shoulder and a pin on the bolt positioned in the opening and interengaging the shoulder, and means for swinging the draft link to disconnect the pin 'from the shoulder and render the swinging handle ineffective to retract the bolt.

5. In a door lock assembly, a retractable latch bolt, swingable inside and outside door handles,

a draft'link, a -pivotal connection between one end of the draft link and the inside door handle, a breakable connection between the other end of the link and the latch bolt in the. form of a pin and shoulder, a shiftable retractor between the outside door handle and the latch bolt; and means including a connection between the shiftable link and shiftable retractor for simultaneously shifting said link and retractor to disconnect the pin from the shoulder and the retractor from the latch bolt whereby the inside and outside handles are rendered ineffective to retract the bolt.

JOHN G. HICKMAN. BENJAMIN A. LAMERAND. 

